(19)

(11)

EP 2 464 915 A2

(12)

(88) Date of publication A3: 05.05.2011 (43) Date of publication: 20.06.2012 Bulletin 2012/25 (21) Application number: 10808491.4 (22) Date of filing: 22.06.2010

(51) International Patent Classification (IPC):  F24F 11/02(2006.01) F24F 5/00(2006.01) F24F 1/02(2011.01) (86) International application number: PCT/US2010/039486 (87) International publication number: WO 2011/019451 (17.02.2011 Gazette 2011/07)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR (30) Priority: 10.08.2009 US 232679 P 04.05.2010 US 773468 04.05.2010 US 773490 (71) Applicant: Emerson Electric Co. St. Louis, MO 63136 (US)	(72) Inventors: MARCINKIEWICZ, Joseph, G. St. Louis MO 63136 (US) CARRIER, Mark, E. St. Louis MO 63136 (US) WILDI, Eric, J. Ladue MO 63124 (US) (74) Representative: Roberts, Mark Peter  J A Kemp 14 South Square Gray's Inn London WC1R 5JJ London WC1R 5JJ (GB)